Pilonidal dimple is a condition that can occur anywhere along the crease between the buttocks, which runs from the bone at the bottom of the spine (sacrum) to the anus.
Pilonidal dimple may appear as:
A pilonidal abscess, in which the hair follicle becomes infected and pus collects in the fat tissue
A pilonidal cyst, in which a cyst or hole forms if there has been an abscess for a long time
A pilonidal sinus, in which a tract grows under the skin or deeper from the hair follicle
A small pit or pore in the skin that contains dark spots or hair
SYMPTOMS
Pus may drain to a small pit in the skin
Tenderness over the area after you are active or sit for a period of time
Warm, tender, swollen area near the tailbone
Fever (rare)
There may be no symptoms other than a small dent (pit) in the skin in the crease between the buttocks.
CAUSES
The cause of pilonidal disease is not clear. It is thought to be caused by hair growing into the skin in the crease between the buttocks.
This problem is more likely to occur in people who:
Are obese
Experienced trauma or irritation in the area
Have excess body hair
Sit for long periods of time
Wear tight clothing
HOME CARE
It may help to keep the area clean and dry and remove hair regularly to prevent infection.
WHEN TO CONTACT A DOCTOR
Call your health care provider if you notice any of the following around the pilonidal cyst:
Pilonidal disease that causes no symptoms does not need to be treated.
A pilonidal abscess may be opened, drained, and packed with gauze. Antibiotics may be used if there is an infection spreading in the skin or you also have another, more severe illness.
